Model # 787264

Internet #100549260

Store SKU #787264

Thermasheath Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board
0719968750017

Thermasheath

Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board

  • Energy efficient
  • For use in residential and commercial buildings
  • ENERGY STAR approved
$ 21 22 /each
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Frequently Bought Together

Frequently Bought Together

Product Overview

  • Energy efficient
  • For use in residential and commercial buildings
  • ENERGY STAR approved
R-Matte Plus-3/Thermasheath-3 is rigid foam plastic thermal insulation board composed of environmentally sound, closed cell, polyisocyanurate foam bonded to a durable white-matte (non-glare) aluminum facer and a reflective reinforced aluminum facer. This product is suitable for use in wall sheathing applications in new residential, commercial and agricultural buildings and for thermal retrofit construction to existing buildings. This ENERGY STAR qualified R-Matte Plus-3/Thermasheath-3 provides R6 with dimensions of 1 in. x 4 ft. x 8 ft. This product is designed for exterior and interior, non-structural uses.
  • Rmax polyiso sheathing offers the GREATEST R-value per inch currently available in a rigid foam board
  • R-Matte plus-3/Thermasheath-3 is applied to the exterior or interior face of wood or metal studs to cover all studs, sills, plates and header constructions, thereby providing insulation over areas not normally covered by insulation products
  • Superior resistance to moisture and vapor in above grade applications
  • Polyiso rigid foam board offers superior fire protection properties compared to any other rigid foam board insulation
  • ENERGY STAR qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • When taped and flashed, the Rmax polyiso board greatly reduces air infiltration and prevents thermal bridging caused by heat and cold transmission through studs
  • Lightweight and easily cut to size
  • How much do you need? Let our calculator help:
    Insulation calculator button

Product Overview

  • Energy efficient
  • For use in residential and commercial buildings
  • ENERGY STAR approved
Model #: 787264
Sku #: 787264
Internet #: 100549260

R-Matte Plus-3/Thermasheath-3 is rigid foam plastic thermal insulation board composed of environmentally sound, closed cell, polyisocyanurate foam bonded to a durable white-matte (non-glare) aluminum facer and a reflective reinforced aluminum facer. This product is suitable for use in wall sheathing applications in new residential, commercial and agricultural buildings and for thermal retrofit construction to existing buildings. This ENERGY STAR qualified R-Matte Plus-3/Thermasheath-3 provides R6 with dimensions of 1 in. x 4 ft. x 8 ft. This product is designed for exterior and interior, non-structural uses.

  • Rmax polyiso sheathing offers the GREATEST R-value per inch currently available in a rigid foam board
  • R-Matte plus-3/Thermasheath-3 is applied to the exterior or interior face of wood or metal studs to cover all studs, sills, plates and header constructions, thereby providing insulation over areas not normally covered by insulation products
  • Superior resistance to moisture and vapor in above grade applications
  • Polyiso rigid foam board offers superior fire protection properties compared to any other rigid foam board insulation
  • ENERGY STAR qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • When taped and flashed, the Rmax polyiso board greatly reduces air infiltration and prevents thermal bridging caused by heat and cold transmission through studs
  • Lightweight and easily cut to size
  • How much do you need? Let our calculator help:
    Insulation calculator button

Info & Guides

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Specifications

Dimensions

Coverage Area (sq. ft.)
32 ft²
Product Length (ft.)
8 ft
Product Thickness (in.)
1 in
Product Width (in.)
48 in

Details

Faced or Unfaced
Faced
Insulation Features
Formaldehyde Free
Insulation Location
2x4 Walls,2x6 Walls,Attics,Basements,Ceilings,Crawlspaces,Ducts,Exterior Sheathing,Garage,Re-Siding
Insulation R-Value
R6
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Product Weight (lb.)
7lb
Sheathing Type
ISO

Warranty / Certifications

Warranty Information
Standard Warranty

Specifications

Dimensions

Coverage Area (sq. ft.)
32 ft²
Product Length (ft.)
8 ft
Product Thickness (in.)
1 in
Product Width (in.)
48 in

Details

Faced or Unfaced
Faced
Insulation Features
Formaldehyde Free
Insulation Location
2x4 Walls,2x6 Walls,Attics,Basements,Ceilings,Crawlspaces,Ducts,Exterior Sheathing,Garage,Re-Siding
Insulation R-Value
R6
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Product Weight (lb.)
7lb
Sheathing Type
ISO

Warranty / Certifications

Warranty Information
Standard Warranty

Questions & Answers

Does R-Max need to be covered by 1/2" sheetrock when installed on basement walls?

Asked by: Randy
Rmax Thermasheath-3 needs to be covered when installed on basement walls. https://www.rmax.com/s/Rmax-Thermasheath-3-Data-Sheet.pdf "WARNING - DO NOT leave Thermasheath®-3 exposed. Polyiso foam is an organic material which will burn when exposed to an ignition source of sufficient heat and intensity and may contribute to flames spreading. Installations utilizing Thermasheath®-3 must be fully protected on the inhabited side of the building by a thermal barrier such as a minimum of 1/2” gypsum wallboard, or equivalent. Consult local Building Codes and insurance authorities regarding special applications or details required when using Thermasheath®-3 as an exposed product." Rmax has three products named Thermasheath; Thermasheath-3, Thermasheath-SI, and Thermasheath-XP. You want Rmax Thermasheath-XP for exposed installations. https://www.rmax.com/thermasheath-xp AFAIK, Thermasheath-XP is not sold by HomeDepot currently.
Answered by: anotherguy
Date published: 2018-09-07

Can this be doubled and create a better r value I have a metal building I wish to insulate but d...

Can this be doubled and create a better r value I have a metal building I wish to insulate but do not wan to use rolls/batts or blow in I do not think the R value of this is enough for the shed
Asked by: Betty
I’m sure it could be , we used it on our sliding door on pole barn , we used the 2” insulated board on the walls and ceiling , it is easy to work with and put up , we noticed a difference immediately, after putting up one corner . Really like this product!!
Answered by: Customer
Date published: 2018-01-06

Can this be used to insulate between the floor joist underneath my wood frame home? I just purch...

Can this be used to insulate between the floor joist underneath my wood frame home? I just purchased it. It was built in 1954, wood floors and I just removed the hideous carpet in it. Now my electric bill is through the roof.......please help!
Asked by: JC
i would not use this product for your job. conventional insulation would be better and provide a much higher R value. This R-Max product is a real good choice but not for in between joists,. don't forget paper to the heated side of application.
Answered by: HOLMESWANABE
Date published: 2018-10-09

I've seen on-line where this is used to build an air tight "box" around can/recessed lights in th...

I've seen on-line where this is used to build an air tight "box" around can/recessed lights in the attic. Box is sealed with fire resistant foam. Is this an acceptable use for it?
Asked by: Geno
Acceptable use? Certainly. So long as the foam isn't right against the can lights own dome and doesn't pinch any wiring. It us UL Fire rated and while I would just use the appropriate tape to seal the edges. Fire resistant foam should be fine. Just don't fill the box with the foam.
Answered by: Nick
Date published: 2018-01-05
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Customer Reviews

Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board is rated 4.7 out of 5 by 46.
Rated 5 out of 5 by from Have been using these to line outdoor cat houses that... Have been using these to line outdoor cat houses that I’ve been building. The boards cut easily with a basic box cutter. Foil outer sheathing is thick and reliable. Keeps the feral kitties warm.
Date published: 2018-11-06
Rated 5 out of 5 by from I use this insulation in my garage doors: it works... I use this insulation in my garage doors: it works great, and very happy with this product. Thanks!
Date published: 2018-11-06
Rated 5 out of 5 by from Good quality.....easy to work with ... Good quality.....easy to work with
Date published: 2018-10-29
Rated 5 out of 5 by from EASY TO WORK WITH SEEMS TO BE A GREAT WAY TO GO FOR HOLDING THE HEAT IN OR HEAT OUT. MY SHOP SIZE... EASY TO WORK WITH SEEMS TO BE A GREAT WAY TO GO FOR HOLDING THE HEAT IN OR HEAT OUT. MY SHOP SIZE IS RIGHT AT 2,000 SQ. FT. I DID A LOT OF RESEARCH BEFORE I WENT WITH THIS R MAX AND IT SEEMS TO BE DOING THE TRICK! THE ONLY TROUBLE I'M HAVING IS THE FOIL TAPE I'M USING FROM HOME DEPOT IS BEGINNING TO PULL OFF AND NOT STICKING WHICH MEANS I'LL HAVE TO RE DO THAT WITH A DIFFERENT BRAND. AFTER THE BOARDS WENT UP I WIPED THE BOARDS WITH A DAMP RAG TO GET A CLEAN SURFACE BEFORE THE TAPE WAS INSTALLED AND APPEARED TO HOLD VERY GOOD BUT WEEKS LATER IT DID NOT STICK. I WOULD DEFINITELY RECOMMEND THE R-MAX TO ANYONE THAT WANTS TO HAVE A PRODUCT THAT IS EASY TO WORK WITH CONSISTENT QUALITY. MAYBE SOMEONE FROM R-MAX WILL READ THIS AND COME OUT WITH A FOIL TAPE THAT THEY HAVE TESTED TO WORK WELL AGAINST THE FOIL THEY USE ON THE R-MAX BOARDS. :)
Date published: 2018-10-16
Rated 5 out of 5 by from Quick, clean and easy. Great R value at a decent... Quick, clean and easy. Great R value at a decent price.
Date published: 2018-10-09
Rated 5 out of 5 by from Used to provide added insulation in the exterior walls and ceilings that were opened up during a ... Used to provide added insulation in the exterior walls and ceilings that were opened up during a shower/bath remodeling project. Easy to cut and fit in between studs and joists.
Date published: 2018-10-02
Rated 5 out of 5 by from Good value.... Good value.
Date published: 2018-09-25
Rated 5 out of 5 by from Great for small diy jobs. I seriously thinking of doing... Great for small diy jobs. I seriously thinking of doing my intier attic with 3” 4X8” foam board insulation. If you hire someone to spray foam it would cost 4 times more. Check out how to install it online. If you install it across the rafters you’ll create necessary ventilation shafts for the roof
Date published: 2018-09-19
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